The notice says hackers have been able to steal personal information, file fake tax returns and redirect the money to themselves. The archdiocese now has a forensic security firm and the FBI on the case.

Here's how it happened:

When employees or many volunteers apply for work, they provide their personal information, including their Social Security number, for a background check. That includes employees, youth ministry volunteers, money counters and more.

The archdioscese learned of the fraud on March 4 and quickly learned at least three parishes and the chancery were affected.

To see if you've been a victim of fraud, check with the IRS to see if a return has been filed in your name by going to the IRS website, calling the tax line or going to the local IRS office.

If your your information has been compromised, report it to the IRS, check your credit reports and notify police to create an identity theft report.

The archdiocese says it has the most secure and current encryption systems, but it appears someone got in anyway.